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Functional neurosurgery

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https://www.readbyqxmd.com/read/28325443/vascular-segmentation-of-head-phase-contrast-magnetic-resonance-angiograms-using-grayscale-and-shape-features
#1
Ruoxiu Xiao, Hui Ding, Fangwen Zhai, Tong Zhao, Wenjing Zhou, Guangzhi Wang
BACKGROUND AND OBJECTIVE: In neurosurgery planning, vascular structures must be predetermined, which can guarantee the security of the operation carried out in the case of avoiding blood vessels. In this paper, an automatic algorithm of vascular segmentation, which combined the grayscale and shape features of the blood vessels, is proposed to extract 3D vascular structures from head phase-contrast magnetic resonance angiography dataset. METHODS: First, a cost function of mis-segmentation is introduced on the basis of traditional Bayesian statistical classification, and the blood vessel of weak grayscale that tended to be misclassified into background will be preserved...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28286721/functional-outcome-after-decompressive-craniectomy-in-patients-with-dominant-or-non-dominant-malignant-middle-cerebral-infarcts
#2
Bilal Kamal Alam, Ahmed S Bukhari, Salman Assad, Pir Muhammad Siddique, Haider Ghazanfar, Muhammad Junaid Niaz, Maryam Kundi, Saima Shah, Maimoona Siddiqui
BACKGROUND:  The use of decompressive craniectomy (DC) has been studied in the setting of different conditions, including traumatic brain injury, subarachnoid hemorrhage, and malignant middle cerebral artery (MCA) infarction. The rationale of this study is to determine the functional outcome after DC in patients with malignant MCA infarcts. METHODS:  A longitudinal cohort study was performed based on patients diagnosed with malignant MCA territory infarction admitted to the Neurosurgery Department of a tertiary care hospital in Islamabad, Pakistan between July 2015 and November 2016...
January 26, 2017: Curēus
https://www.readbyqxmd.com/read/28269287/a-measure-of-cortico-cortical-potentials-evoked-by-10-hz-direct-electrical-stimulation-of-the-brain-and-by-means-of-a-differential-recording-mode-of-electrocorticographic-signals
#3
Marion Vincent, Olivier Rossel, Hugues Duffau, Francois Bonnetblanc, David Guiraud
Direct electrical stimulation (DES) at 60 Hz is used to perform real-time functional mapping of the brain during wide-awake neurosurgery. The electrophysiological effects of DES are largely unknown, locally and at a more remote distance. Here, by lowering the DES frequency to 10 Hz and by using a differential recording mode of electro-corticographic (ECoG) signals to improve the focality, we were able to record cortico-cortical evoked potentials easily with standard current amplitude of stimulation (2 mA). DES applied at 10 Hz and differential recording of ECoG could be used to map on-line the connectivity between different sub-cortical and cortical areas with a higher spatial accuracy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28263047/mapping-the-connectome-in-awake-surgery-for-gliomas-an-update
#4
Hugues Duffau
The traditional principle underlying oncological neurosurgery is to remove a tumor mass displacing the brain in order to increase survival. Recently, advances in connectomics enabled an improved understanding of cerebral processing, and led to a paradigmatic shift in tumor surgery based upon interactions between neurooncology and cognitive neurosciences. First, glioma is not a focal tumor invaginated within the parenchyma but a diffuse neoplastic disease migrating in the brain. This concept resulted in a new surgical ideology, i...
March 6, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28261083/automatic-and-precise-localization-and-cortical-labeling-of-subdural-and-depth-intracranial-electrodes
#5
Chaoyi Qin, Zheng Tan, Yali Pan, Yanyan Li, Lin Wang, Liankun Ren, Wenjing Zhou, Liang Wang
Object: Subdural or deep intracerebral electrodes are essential in order to precisely localize epileptic zone in patients with medically intractable epilepsy. Precise localization of the implanted electrodes is critical to clinical diagnosing and treatment as well as for scientific studies. In this study, we sought to automatically and precisely extract intracranial electrodes using pre-operative MRI and post-operative CT images. Method: The subdural and depth intracranial electrodes were readily detected using clustering-based segmentation...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28260435/role-of-more-active-identification-of-brain-dead-cases-in-increasing-organ-donation
#6
Farahnaz Sadegh Beigee, Mojtaba Mohsenzadeh, Shagin Shahryari, Meysam Mojtabaee
OBJECTIVES: Organ donor shortage is a worldwide problem, resulting in 10% to 30% mortality rates for patients on wait lists for organ transplant. For brain-dead patients in Iran, it is mandatory for intensive care unit patients with Glasgow Coma Scale below 5/15 to be reported to an organ procurement unit. However, this process has not been functioning effectively. Here, we present the effects of changing the strategies on detecting brain-dead cases on the organ donor pool. MATERIALS AND METHODS: From March 2015 to March 2016, we changed our strategy in active detection of brain-dead cases...
February 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28242489/neurosurgery-and-music-the-effect-of-wolfgang-amadeus-mozart
#7
Elena Romana Gasenzer, Ayhan Kanat, Edmund Neugebauer
BACKGROUND: The nervous system works like a great orchestra. Specially the music of Mozart with its´ "Mozart´s effect" is appropriate to use in neurosurgery. The paper investigates the relationship between music and neurosurgery, Mozart´s music in neurosurgical practice. MATERIAL AND METHODS: We used digital catalogues like "pubmed" as well as the libraries of universities. Key words were "Wolfgang Amadeus Mozart", "neurosurgery and music". RESULTS: At the first half of 20 century, neurosurgical approach of some musicians have resulted with fatal outcome such as Maurice Ravel, Josef Hassid,George Gershwin...
February 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28242336/most-efficient-questionnaires-to-measure-quality-of-life-physical-function-and-pain-in-patients-with-metastatic-spine-disease-a-cross-sectional-prospective-survey-study
#8
Nuno Rui Paulino Pereira, Stein J Janssen, Kevin A Raskin, Francis J Hornicek, Marco L Ferrone, John H Shin, Jos A M Bramer, Cornelis Nicolaas van Dijk, Joseph H Schwab
BACKGROUND CONTEXT: Assessing quality of life, functional outcome, and pain has become important in assessing the effectiveness of treatment for metastatic spine disease. Many questionnaires are able to measure these outcomes; few are validated in patients with metastatic spine disease. As a result, there is no consensus on the ideal questionnaire to use in these patients. PURPOSE: Our study aim was to assess whether certain questionnaires measuring quality of life, functional outcome, and pain (1) correlated with each other, (2) measured the construct they claim to measure, (3) had good coverage-floor and ceiling effects, (4) were reliable, and (5) whether there were differences in completion time between them...
February 24, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28237005/pediatric-epilepsy-neurology-functional-imaging-and-neurosurgery
#9
REVIEW
James M Mountz, Christina M Patterson, Mandeep S Tamber
In this chapter we provide a comprehensive review of the current role that functional imaging can have in the care of the pediatric epilepsy patient from the perspective of the epilepsy neurologist and the epilepsy neurosurgeon. In the neurology section, the diagnosis and classification of epilepsy adapted by the International League Against Epilepsy as well as the etiology and incidence of the disease is presented. The neuroimaging section describes how advanced nuclear medicine imaging methods can be synergized to provide a maximum opportunity to localize an epileptogenic focus...
March 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28236597/cognitive-change-1-year-after-cea-or-cas-compared-with-medication
#10
Junko Watanabe, Toshiyasu Ogata, Toshio Higashi, Tooru Inoue
BACKGROUND: Whether improvement of cognitive function can be maintained remains controversial. AIMS: This study aimed to investigate cognitive changes between before carotid endarterectomy (CEA) or carotid artery stenting (CAS) and 1 year after intervention using cognitive evaluation tools. METHODS: Patients suspected as having carotid stenosis were prospectively registered for evaluation of cognitive function from October 2011 to December 2013 in the Department of Neurosurgery, Fukuoka University Hospital...
February 21, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28227523/a-measure-of-cortico-cortical-potentials-evoked-by-10-hz-direct-electrical-stimulation-of-the-brain-and-by-means-of-a-differential-recording-mode-of-electrocorticographic-signals
#11
Marion Vincent, Olivier Rossel, Hugues Duffau, Francois Bonnetblanc, David Guiraud, Marion Vincent, Olivier Rossel, Hugues Duffau, Francois Bonnetblanc, David Guiraud, Olivier Rossel, David Guiraud, Francois Bonnetblanc, Hugues Duffau, Marion Vincent
Direct electrical stimulation (DES) at 60 Hz is used to perform real-time functional mapping of the brain during wide-awake neurosurgery. The electrophysiological effects of DES are largely unknown, locally and at a more remote distance. Here, by lowering the DES frequency to 10 Hz and by using a differential recording mode of electro-corticographic (ECoG) signals to improve the focality, we were able to record cortico-cortical evoked potentials easily with standard current amplitude of stimulation (2 mA). DES applied at 10 Hz and differential recording of ECoG could be used to map on-line the connectivity between different sub-cortical and cortical areas with a higher spatial accuracy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223250/dorsal-cervical-spinal-cord-herniation-precipitated-by-kyphosis-deformity-correction-for-spinal-cord-tethering
#12
Robert S Heller, Steven W Hwang, Ron I Riesenburger
INTRODUCTION: Cervical spinal cord herniation is a rare clinical entity. Reported after previous intradural surgery or surgery complicated by durotomy, patients return several months to years later with symptoms of worsening myelopathy. Herein is presented a case of a 51-year-old female patient with spinal cord herniation in the cervical spine after kyphosis deformity correction. CASE DESCRIPTION: A 51-year old female patient presented to the neurosurgery clinic with worsening cervical myelopathy due to cervical spinal cord tethering and adhesions from previous intradural surgery for Chiari malformation...
February 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28185669/electrical-stimulation-and-monitoring-devices-of-the-cns-an-imaging-review
#13
REVIEW
Sohil H Patel, Casey H Halpern, Timothy M Shepherd, Vincent M Timpone
Functional neurosurgery is a rapidly growing field with exciting future potential applications. This article describes currently used implanted electronic devices for neurologic stimulation and monitoring. The devices to be reviewed include invasive EEG electrodes, deep brain stimulator, motor cortex stimulator, responsive neurostimulation, osteo-integrated hearing aid, middle ear implant, cochlear implant, auditory brainstem implant, vagal nerve stimulator and spinal cord stimulator. Emphasis is placed on the normal components, function, positioning, potential complications and MRI safety of these devices...
February 6, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28169349/dynamic-hub-load-predicts-cognitive-decline-after-resective-neurosurgery
#14
Ellen W S Carbo, Arjan Hillebrand, Edwin van Dellen, Prejaas Tewarie, Philip C de Witt Hamer, Johannes C Baayen, Martin Klein, Jeroen J G Geurts, Jaap C Reijneveld, Cornelis J Stam, Linda Douw
Resective neurosurgery carries the risk of postoperative cognitive deterioration. The concept of 'hub (over)load', caused by (over)use of the most important brain regions, has been theoretically postulated in relation to symptomatology and neurological disease course, but lacks experimental confirmation. We investigated functional hub load and postsurgical cognitive deterioration in patients undergoing lesion resection. Patients (n = 28) underwent resting-state magnetoencephalography and neuropsychological assessments preoperatively and 1-year after lesion resection...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28162255/direct-electrical-bipolar-electrostimulation-for-functional-cortical-and-subcortical-cerebral-mapping-in-awake-craniotomy-practical-considerations
#15
J Pallud, O Rigaux-Viode, R Corns, J Muto, C Lopez Lopez, C Mellerio, X Sauvageon, E Dezamis
INTRODUCTION: The aim of brain glioma surgery is to maximize the quality of resection, while minimizing the risk of sequelae. Due to the frequent location of gliomas near or within eloquent areas, owing to their infiltrative feature, and because of major interindividual variability, the anatomofunctional organization and connectivity must be studied individually. Therefore, to optimize the benefit-to-risk ratio of surgery, intraoperative functional mapping is extensively used. MATERIAL AND METHODS: This article aims at describing the rationale, indications and practical aspects of intraoperative direct electrical bipolar electrostimulation for cortical and subcortical mapping under awake conditions using the asleep-awake asleep anaesthetic protocol in the setting of cerebral gliomas...
February 2, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28159330/neurosurgery-of-the-future-deep-brain-stimulations-and-manipulations
#16
Stylianos Nicolaidis
Important advances are afoot in the field of neurosurgery-particularly in the realms of deep brain stimulation (DBS), deep brain manipulation (DBM), and the newly introduced refinement "closed-loop" deep brain stimulation (CLDBS). Use of closed-loop technology will make both DBS and DBM more precise as procedures and will broaden their indications. CLDBS utilizes as feedback a variety of sources of electrophysiological and neurochemical afferent information about the function of the brain structures to be treated or studied...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28150698/gilles-de-la-tourette-syndrome
#17
REVIEW
Mary M Robertson, Valsamma Eapen, Harvey S Singer, Davide Martino, Jeremiah M Scharf, Peristera Paschou, Veit Roessner, Douglas W Woods, Marwan Hariz, Carol A Mathews, Rudi Črnčec, James F Leckman
Gilles de la Tourette syndrome (GTS) is a childhood-onset neurodevelopmental disorder that is characterized by several motor and phonic tics. Tics usually develop before 10 years of age, exhibit a waxing and waning course and typically improve with increasing age. A prevalence of approximately 1% is estimated in children and adolescents. The condition can result in considerable social stigma and poor quality of life, especially when tics are severe (for example, with coprolalia (swearing tics) and self-injurious behaviours) or when GTS is accompanied by attention-deficit/hyperactivity disorder, obsessive-compulsive disorder or another neuropsychiatric disorder...
February 2, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28124435/current-applications-and-limitations-of-surgical-treatments-for-movement-disorders
#18
REVIEW
Paul Krack, Raul Martinez-Fernandez, Marta Del Alamo, Jose A Obeso
Functional neurosurgery for the treatment of both psychiatric and neurological disorders has been performed regularly since the 1940s. However, misuse in the early days and the appearance of effective medical treatments, such as levodopa and neuroleptic drugs, greatly reduced surgical approaches over several decades. The development of a comprehensive model of basal ganglia pathophysiology in the 1990s facilitated the resurgence of functional neurosurgery, mainly for the treatment of levodopa-related motor complications in Parkinson's disease...
January 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28124429/what-would-dr-james-parkinson-think-today-i-the-role-of-functional-neurosurgery-for-parkinson-s-disease
#19
Marwan Hariz, Jose A Obeso
No abstract text is available yet for this article.
January 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28120080/functional-magnetic-resonance-imaging-fmri-pre-intraoperative-tractography-in-neurosurgery-the-experience-of-sant-andrea-rome-university-hospital
#20
Giancarlo D'Andrea, Giuseppe Trillo', Veronica Picotti, Antonino Raco
BACKGROUND: The goal of neurosurgery for cerebral intraparenchymal neoplasms of the eloquent areas is maximal resection with the preservation of normal functions, and minimizing operative risk and postoperative morbidity. Currently, modern technological advances in neuroradiological tools, neuronavigation, and intraoperative magnetic resonance imaging (MRI) have produced great improvements in postoperative morbidity after the surgery of cerebral eloquent areas. The integration of preoperative functional MRI (fMRI), intraoperative MRI (volumetric and diffusion tensor imaging [DTI]), and neuronavigation, defined as "functional neuronavigation" has improved the intraoperative detection of the eloquent areas...
2017: Acta Neurochirurgica. Supplement
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